EVP_seed(3) - phpMan

EVP_seed_cbc (3ssl)  - EVP SEED cipher
EVP_seed_cfb (3ssl)  - EVP SEED cipher
EVP_seed_cfb128 (3ssl) - EVP SEED cipher
EVP_seed_ecb (3ssl)  - EVP SEED cipher
EVP_seed_ofb (3ssl)  - EVP SEED cipher